Table 2.

Latin square design of condition rounds over time at the three clinical genetic centres

	Conditionsa
	months 1–5	months 6–10	months 11–15	months 16–20	months 21–25
Centre A	1	2	3	4	5
Centre B	2	3	4	5	1
Centre C	5	1	2	3	4

^a. 1) lifetime risk in numerical format (natural frequencies); 2) lifetime risk in both numerical format and graphical format (population figures); 3) lifetime risk and age-related risk in numerical format; 4) lifetime risk and age-related risk in both numerical format and graphical format; 5) lifetime risk in percentages. Condition 6 (control group) is constructed in addition to each condition round.